Quote:
Originally Posted by ghettoluxury
AC Delco R45TS or R44T the only plugs I use in a chevy Big Block.
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I x 4 or 5 where ever I'm at on this list only because AC are a gm brand, but I'd think about leaning towerds prostreet68sb if I had changed internals for more power
Quote:
Originally Posted by ProStreet68SB
NGK ur4s are exactly what we run in our big block, and were actually recommended by a ton of very knowledgeable people over on the team chevelles forum.
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